package com.itheima.edu.info.manager.controller;

import com.itheima.edu.info.manager.domain.Teacher;
import com.itheima.edu.info.manager.service.TeacherService;

import java.util.Scanner;

public class TeacherController {
    private Scanner sc = new Scanner(System.in);
    private TeacherService teacherService = new TeacherService();

    public void start() {
        teacherLoop:
        while (true) {
            System.out.println("--------欢迎来到 <老师> 管理系统--------");
            System.out.println("请输入您的选择: 1.添加老师  2.删除老师  3.修改老师  4.查看老师  5.退出");
            int choice = sc.nextInt();
            switch (choice) {
                case 1:
//                    System.out.println("添加老师");
                    addTeacher();
                    break;
                case 2:
//                    System.out.println("删除老师");
                    deleteTeacherById();
                    break;
                case 3:
//                    System.out.println("修改老师");
                    updateTeacher();
                    break;
                case 4:
//                    System.out.println("查询老师");
                    findAllTeacher();
                    break;
                case 5:
                    System.out.println("退出");
                    System.out.println("感谢您使用老师管理系统，再见！");
                    break teacherLoop;
                default:
                    System.out.println("您的输入有误，请重新输入！");
                    break;
            }
        }
    }

    public void updateTeacher() {
        String updateId = inputTeacherId();
        Teacher newTeacher = inputTeacherInFo(updateId);
        teacherService.updateTeacher(updateId, newTeacher);
        System.out.println("修改成功！");

    }

    public void deleteTeacherById() {

        String deId = inputTeacherId();
        teacherService.deleteTeacherById(deId);
        System.out.println("删除成功！");

    }

    public void findAllTeacher() {
        Teacher[] teachers = teacherService.findAllTeacher();
        if (teachers == null) {
            System.out.println("查无信息，请添加后重试！");
            return;
        }
        System.out.println("学号\t\t姓名\t年龄\t生日");
        for (int i = 0; i < teachers.length; i++) {
            Teacher t = teachers[i];
            if (t != null) {
                System.out.println(t.getId() + "\t" + t.getName() + "\t" + t.getAge() + "\t\t" + t.getBirthday());
            }
        }
    }

    public void addTeacher() {
        String id;
        while (true) {
            System.out.println("请输入老师id:");
            id = sc.next();
            boolean exists = teacherService.isExists(id);
            if (exists) {
                System.out.println("id已被占用，请重新输入！");
            } else {
                break;
            }
        }
        Teacher t = inputTeacherInFo(id);
        boolean result = TeacherService.addTeacher(t);
        if (result) {
            System.out.println("添加成功！");
        } else {
            System.out.println("添加失败！");
        }
    }

    public String inputTeacherId() {
        String id;
        while (true) {
            System.out.println("请输入id:");
            id = sc.next();
            boolean exists = teacherService.isExists(id);

            if (!exists) {
                System.out.println("您输入的id不存在，请重新输入！");
            } else {
                break;
            }
        }
        return id;
    }

    public Teacher inputTeacherInFo(String id) {
        System.out.println("请输入老师姓名:");
        String name = sc.next();
        System.out.println("请输入老师年龄:");
        String age = sc.next();
        System.out.println("请输入老师生日:");
        String birthday = sc.next();
        Teacher teacher = new Teacher();
        teacher.setId(id);
        teacher.setAge(age);
        teacher.setBirthday(birthday);
        teacher.setName(name);
        return teacher;
    }
}
